Telephone receiver



A. .J. ROBERTS TELEPHONE RECEIVER Filed July 29, 1927 INVENTOR ATTOR N EV WITNESS:

Patented July 24, 1928,

UNITEDSTATES ALBERT JOE ROBERTS, or WARREN, 01110.

'rnnnrnonn RECEIVER.

Application filed July 29,

This invention relates to improvements in telephone receiving instruments and has for an object the provision of an instrument in which the receiving circuit is normally interrupted, as when the invention is not in use, the circuit being used when the instrument is in use by pressure of the fingers of the user when holding the instrument.

Another object of the invention is the provision of novel means for accomplishing the above, which in addition to other advantageous features, are simple and inexpensive in construction and reliable and eificient in use.

With the above and other objects in view, the invention further includes the following novel features and details of construction, to be hereinafter more fully described, illustrated in the accompanying drawings and pointed out in the'appended claims.

In the drawings Figure l is a sectional view of a receiving instrument constructed in accordance with the invention.

Figure 2 is an elevation of the same.

Figure 8 is a fragmentary elevation of one end of the instrument.

Figure 4 is an elevation showing the receiving instrument supported upon the transformer box.

Referring to the drawings in detail wherein like characters of reference denote corresponding parts, thereference character 10 indicatesthe receiver shell which is formed of insulating material and which is closed at one end by an ear piece 11, the latter being threadedly mounted upon the shell in the usual manner. Located within the shell is a magnet 13 which is supported by rings 14: and 15 secured within the shell, while mounted upon the magnet are the usual coils 16 arranged in juxtaposition to the ordinary diaphragm 17 The shell 10 is provided with a slot 18 and located within this slot is a finger piece 19, the latter being provided with depressions 20 within which the fingers of the user of the instrument are placed. Secured to the finger piece is a conductor plate or bar 21 and secured to one end of this bar is one end of a resilient strip 22 whose opposite end is embedded in the shell and is secured between the inner wall of the shell and the outer periphery of the ring 14 as shown at 23. The plate 21 is adapted to be connected in a receiving circuit and for this purpose one r927. Serial No. 209,300. 1

terminal of a conductor wire 24 is connected to the plate by a binding'screw 25.

The opposite end of the plate 21 is provided with a lip or lug to form a contact 26 and secured Within the shell in the path of movement of the contact 26 is a stationary contact 27. The contact 27 may form a part of the ring 15 andis connected by means of a conductor 28 with the magnets 16 in the usual manner. i

The finger piece 19 is provided with a reduced extension 29 and the shell 10 is provided with an overhanging portion which forms a stop 30 to limit outward movement of this end of the finger piece, inward movement being limited by means of an'abutment or stop 31 provided upon the shell. The extension 29 of the finger piece is thus housed within a recess and the stops 30 and 31 limit its movement in opposite directions. A spring 32 is interposed between the extension 29 and the stop 31 so as to normally separate the contacts 26 and 27. A lug 33 is provided at the opposite end of the shell 10 adjacent the end of the finger'piece and this lug also acts as a stop to limit outward movement of the opposite end of the finger plece.

Secured to the shell 10 is a hanger element 34 which is adapted to engage over a hook 35 carried by the transformer box 36. The receiving instrument may thus be conveniently supported upon the transmitter box.

The invention is susceptible of various changes in its form, proportions and minor details of construction and the right is herein reserved to make such changes as properly fall'within the scope of the appended claims.

Having described the invention what is claimed is 1. In a telephone receiving instrument, an insulated shell having a slot therein, a finger piece mounted for movement in said slot, a conductor plate carried by and movable with the finger piece and adapted for connection in a receiving circuit, a contact carried by the plate, a contact carried by and located in the shell and also adapted to be connected in the receiving circuit, said shell carried contact being normally spaced from and adapted to be engaged by the plate carried contact to close the circuit when the finger piece is moved inward and spaced shell carried stops located upon opposite sides of the finger piece to limit its movement in opposite directions.

2. In a telephone receiving instrument, an

and its opposite end connected with the'finger piece to movably mount the latter, a

conductor plate carried by and movable With the finger piece and adapted for connection in a receiving circuit, a contact carried by the plate, a contact carried by and located in the shell and also adapted to be connected in the receiving circuit, said shell carried contact being normally spaced from and adapted to be engaged by the plate carried.

contact to close the circuit When the finger plece 1s moved inward and a reduced exten sion provided at one end of the finger piece and operating Within the recess to limit movement of the finger piece.

In testimony whereof I afliX my signature.

ALBERT JOE ROBERTS I 

